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2.04.9 <br />grasses can be planted late in summer and in fall to protect the soil from <br />erosion and to provide grazing for livestock, if good pasture management is <br />practiced. Siberian wheatgrass, Fairway wheatgrass, crested wheatgrass, <br />and pubescent wheatgrass are adapted species. <br />The potential plant community on this soil consists mainly of bluebunch <br />wheatgrass, Junegrass, western wheatgrass, Indian ricegrass, galleta, <br />need lea ndthread, and squirreltail. As range condition deteriorates, <br />wheatgrasses, Indian ricegrass, Junegrass, and needleandthread decrease, <br />forbs and woody shrubs increase, and undesirable weeds and annual plants <br />invade and become more abundant. <br />This soil is used for winter range by mule deer. Big sagebrush, <br />mountainmahogany, and bitterbrush are important browse species which can <br />be managed for optimum production. <br />This soil is suited to most of the orchard crops grown in the survey area. The <br />principal orchard crops grown on this soil are apples, pears, peaches, and <br />cherries. Because of shortness of the growing season and frost which occurs <br />early in spring, crops can be severely damaged. Areas that have good air <br />drainage should be selected. Cover crops are necessary to control erosion <br />but should be managed so that they do not compete with fruit trees. <br />Application of fertilizer promotes the best growth of trees and the production <br />of high quality fruit. Fertilizer requirements should be based on soil orfoliage <br />analysis. An intensive spray program is generally needed to control insects <br />and disease. Estimated average yields per acre for orchard crops are as <br />follows: apples, 750 bushels; peaches, 550 bushels; cherries, 800 bushels; <br />and pears, 500 bushels. <br />Map Unit 8 (62) - Progresso loam 6 to 12 percent slopes. This is a <br />moderately deep, well drained soil that overlies Dakota Sandstone at a depth <br />of 20 to 40 inches. It formed in locally transported sediment derived from <br />interbedded sandstone and shale and is on uplands and fans. Elevation <br />ranges from 5,800 to 7,000 feet. Average annual precipitation is about 12 <br />inches, average annual air temperature is about 46 degrees F, and the <br />average frost -free season is about 115 days. <br />PR -14 2.04-80- 03/14 <br />